loader: Map all of RAM in the loader#511
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As opposed to them being accessed via global variables directly. The reason to do this is to enable us to vary the page table placement from the C side without needing to touch or modify the assembly any further, which will enable the future commits for making the number of page page table structures dynamic, which is necessary for making the loader 1:1 all of RAM. Also, remove some redundant stack pops/pushs to util64.S. Signed-off-by: Julia Vassiliki <julia.vassiliki@unsw.edu.au>
This performs cleanups to the loader code, to remove a bunch of boilerplate, and also makes the page table entries placed in the loader binary at the end. This is in preparation for moving towards mapping all of RAM in the loader. Signed-off-by: Julia Vassiliki <julia.vassiliki@unsw.edu.au>
Signed-off-by: Julia Vassiliki <julia.vassiliki@unsw.edu.au>
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This will fix #463 (closing #465) and #466.
Currently, this is blocked on somehow breaking SMP, for reasons I don't understand.
Opening this here as a reminder for fixing soon.